Ronaldo needs to earn $5,250 to pay for his courses.
Since he earns $35 per lawn, he needs to mow $5,250 / $35 = <<5250/35=150>>150 lawns. Answer: \boxed{150}.
Ronaldo plans to take courses in carpentry that will cost $5,250. He mows lawns for $35. How many lawns will he have to mow to pay for his courses?
1 answer